The Realms of Being

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Realms of Being (1942) is the last major work by Spanish-American philosopher George Santayana. Along with Scepticism and Animal Faith and The Life of Reason, it is his most notable work; the first two works concentrate primarily on epistemology and ethics respectively, whereas Realms of Being is mainly a work in the field of ontology.

Santayana builds on his Skepticism and Animal Faith, which he described as a sort of precursor to "a new system of philosophy", that would be developed fully in the present work.^[1] He defines four realms of being; The Realm of Essence, The Realm of Matter, The Realm of Truth, and The Realm of Spirit.